Object Definitions for Ramp Meter Control (RMC) Units

Defines communication protocol for ramp metering
control (RMC) units. Communicating together, RMC units detect both traffic on
the main roadway and queued traffic preparing to enter the main roadway,
optimizing traffic flow for both. RMC units include a field controller, its
suite of sensors, and its warning signs and signals, as well as main roadway
and queue detection stations.